Help me

Megha

I am confused if i’m having a period or implantation bleeding. So my partner and i had sex on 2nd april and i took a Plan -B after 17 hours . My period is not due for until next week but yesterday, i experience light spotting , today I experienced heavy bleeding. Not sure what to make out of it as i usually experience cramps but there are no cramps . Also , there is tissue coming out (Sorry for tmi) . Please help